徐家围子西部地区层序划分及控制因素分析
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摘要
以层序地层学理论为指导,通过地震解释和井震结合,依照层序划分原则,对二级和三级层序的特征和识别标志进行研究,提出了徐家围子西部地区的层序划分方案。将该地区深层地层划分为4个二级层序和8个三级层序。二级层序为构造层序,三级层序是由不整合面及与其对应的整合面所限定的地层单元。层序的发育是多种因素综合作用的结果,研究区的层序主要受构造、气候、沉积物供给速率、湖平面变化和火山喷发的影响,这些因素相互作用影响基准面和可容空间的周期性变化,进而影响层序的发育特征。
Under the condition of sequence stratigraphic theory and sequence classification principle, the boundary characteristics and identification marks of different orders of sequences were studied based on seismic and logging data. Accordingly, sequence frameowork in the west of Xujiaweizi Area was established. The deep strata were consisted of 4 second-order sequences and 8 third-order sequences in the west of Xujiaweizi Area. Second-order sequences were tectonic sequences. Third-order sequences were bounded by unconfirmities and confirmities. The development of sequence in the west of Xujiaweizi Area is controlled by tectonic, climate, sediment supply rate, lake-level change and volcanic outbreak. All the above factors interact each other to affect the periodical change of base-level and accommodation space, and control the characteristics of sequence.
Under the condition of sequence stratigraphic theory and sequence classification principle, the boundary characteristics and identification marks of different orders of sequences were studied based on seismic and logging data. Accordingly, sequence frameowork in the west of Xujiaweizi Area was established. The deep strata were consisted of 4 second-order sequences and 8 third-order sequences in the west of Xujiaweizi Area. Second-order sequences were tectonic sequences. Third-order sequences were bounded by unconfirmities and confirmities. The development of sequence in the west of Xujiaweizi Area is controlled by tectonic, climate, sediment supply rate, lake-level change and volcanic outbreak. All the above factors interact each other to affect the periodical change of base-level and accommodation space, and control the characteristics of sequence.
引文
[1]刘学锋,王正允,孟令奎.徐家围子断陷深层构造演化与天然气聚集[J].江汉石油学院学报,2003,25(4):9~11.
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[2]纪友亮.层序地层学[M].上海:同济大学出版社,2005.31~172.
[3]李善营,于炳松,姚继明,等.秭归盆地上侏罗统露头层序地层研究[J].石油天然气学报,2008,30(2):191~194.
[4]苗顺德,冯有良,李秋芬.黄骅坳陷歧口凹陷古近系层序地层格架及其特征分析[J].现代地质,2007,21(4):697~704.
[5]孙志华,吴奇之,张一伟,等.层序界面在地球物理资料上的响应特征[J].石油地球物理勘探,2001,36(5):626~632.
[6]赵国连,何顺利.松辽盆地徐家围子裂陷式盆地的层序发育特点[J].西北地质,2002,35(1):28~40.
[7]王嗣敏,刘招君,董清水,等.陆相盆地层序地层形成机制分析——以松辽盆地为例[J].长春科技大学学报,2000,30(2):139~144.
[8]刘招君.陆相层序地层导论与应用[M].北京:石油工业出版社,2002.
[9]邓宏文.美国层序地层研究中的新学派-高分辨率层序地层学[J].石油与天然气地质,1995,16(2):89~97.
[10]李江涛,李增学,郭建斌,等.高分辨率层序地层分析中基准面变化的讨论[J].沉积学报,2005,23(2):297~302.
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